ci2 starts bisection 2026-09-20 20:47:34.267869209 +0000 UTC m=+222505.644544122 bisecting fixing commit since 61d896ee2a8005c4e9d9da24421ba554601421be building syzkaller on 2377cd3dcd3c2e96dc5bd3c92c152122cdd05d7a ensuring issue is reproducible on original commit 61d896ee2a8005c4e9d9da24421ba554601421be testing commit 61d896ee2a8005c4e9d9da24421ba554601421be gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 57f6c84136240d173f9b041d43b8b9b226243f08d0f53ba27ed1c965d0623230 all runs: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get representative crash: KASAN: slab-out-of-bounds Write in firmware_param_path_get, types: [KASAN-WRITE] check whether we can drop unnecessary instrumentation disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit 61d896ee2a8005c4e9d9da24421ba554601421be gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: a4ef6c84abac0a5df98ac6565e3bd01b285ee9f7f461f0f03cae29ee69066e68 run #0: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #1: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #2: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #3: crashed: KASAN: use-after-free Write in firmware_param_path_get run #4: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #5: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #6: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #7: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #8: crashed: KASAN: use-after-free Write in firmware_param_path_get run #9: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get representative crash: KASAN: slab-out-of-bounds Write in firmware_param_path_get, types: [KASAN-WRITE] the bug reproduces without the instrumentation disabling configs for [memleak ubsan bug_or_warning locking atomic_sleep hang], they are not needed kconfig minimization: base=4921 full=6218 leaves diff=256 split chunks (needed=false): <256> split chunk #0 of len 256 into 5 parts testing without sub-chunk 1/5 disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit 61d896ee2a8005c4e9d9da24421ba554601421be gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 7d24f33ac75a1dc1a62b45f31f88ca3e0fe1b7a34c941091b6337e5e5f906c99 run #0: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #1: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #2: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #3: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #4: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #5: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #6: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #7: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #8: crashed: KASAN: use-after-free Write in firmware_param_path_get run #9: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get representative crash: KASAN: slab-out-of-bounds Write in firmware_param_path_get, types: [KASAN-WRITE] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [hang memleak ubsan bug_or_warning locking atomic_sleep], they are not needed testing commit 61d896ee2a8005c4e9d9da24421ba554601421be gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: fc82484f013c37b8a330c504b7c64fa68ce3cad5f92c2bac2faf49639c0baf47 run #0: crashed: KASAN: use-after-free Write in firmware_param_path_get run #1: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #2: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #3: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #4: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #5: crashed: KASAN: use-after-free Write in firmware_param_path_get run #6: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #7: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #8: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #9: crashed: KASAN: use-after-free Write in firmware_param_path_get representative crash: KASAN: slab-out-of-bounds Write in firmware_param_path_get, types: [KASAN-WRITE KASAN-USE-AFTER-FREE-WRITE] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [memleak ubsan bug_or_warning locking atomic_sleep hang], they are not needed testing commit 61d896ee2a8005c4e9d9da24421ba554601421be gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: ce9c051e04158a756683bbd3fcd95bd78fbf0ad6bc32a0144819cf59b4bd26f4 run #0: crashed: KASAN: use-after-free Write in firmware_param_path_get run #1: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #2: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #3: crashed: KASAN: use-after-free Write in firmware_param_path_get run #4: crashed: KASAN: use-after-free Write in firmware_param_path_get run #5: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #6: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #7: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #8: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #9: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get representative crash: KASAN: slab-out-of-bounds Write in firmware_param_path_get, types: [KASAN-WRITE KASAN-USE-AFTER-FREE-WRITE] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit 61d896ee2a8005c4e9d9da24421ba554601421be gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: c17ad8aca9eea0514e36a3549ab7e0418bae13d42088b988ab5cf8c38c6fc90f run #0: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #1: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #2: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #3: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #4: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #5: crashed: KASAN: use-after-free Write in firmware_param_path_get run #6: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #7: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #8: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #9: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get representative crash: KASAN: slab-out-of-bounds Write in firmware_param_path_get, types: [KASAN-WRITE] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [bug_or_warning locking atomic_sleep hang memleak ubsan], they are not needed testing commit 61d896ee2a8005c4e9d9da24421ba554601421be gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 failed building 61d896ee2a8005c4e9d9da24421ba554601421be: net/socket.c:1189:(.text+0x6dea): undefined reference to `wext_handle_ioctl' net/socket.c:3390:(.text+0x73e4): undefined reference to `compat_wext_handle_ioctl' net/core/net-procfs.c:343:(.text+0x33b): undefined reference to `wext_proc_exit' net/core/net-procfs.c:327:(.text+0x4e2): undefined reference to `wext_proc_init' minimized to 48 configs; suspects: [HID_ZEROPLUS USB_NET_CDC_SUBSET USB_NET_CDC_SUBSET_ENABLE USB_NET_DM9601 USB_NET_GL620A USB_NET_MCS7830 USB_NET_NET1080 USB_NET_PLUSB USB_NET_RNDIS_HOST USB_NET_SMSC75XX USB_NET_SMSC95XX USB_NET_SR9700 USB_NET_SR9800 USB_NET_ZAURUS USB_OHCI_HCD USB_OHCI_HCD_PCI USB_OHCI_HCD_PLATFORM USB_OTG USB_OTG_FSM USB_PRINTER USB_SERIAL USB_SERIAL_FTDI_SIO USB_SERIAL_GENERIC USB_SERIAL_PL2303 USB_STORAGE_ALAUDA USB_STORAGE_CYPRESS_ATACB USB_STORAGE_DATAFAB USB_STORAGE_FREECOM USB_STORAGE_ISD200 USB_STORAGE_JUMPSHOT USB_STORAGE_KARMA USB_STORAGE_ONETOUCH USB_STORAGE_SDDR09 USB_STORAGE_SDDR55 USB_STORAGE_USBAT USB_TRANCEVIBRATOR USB_U_AUDIO USB_U_ETHER USB_U_SERIAL USB_WDM USB_XHCI_PCI_RENESAS WLAN WLAN_VENDOR_ATH WLAN_VENDOR_ATMEL WLAN_VENDOR_BROADCOM WLAN_VENDOR_INTERSIL WLAN_VENDOR_MARVELL WLAN_VENDOR_MEDIATEK WLAN_VENDOR_MICROCHIP WLAN_VENDOR_RALINK WLAN_VENDOR_REALTEK WLAN_VENDOR_RSI WLAN_VENDOR_ZYDAS ZEROPLUS_FF] disabling configs for [ubsan bug_or_warning locking atomic_sleep hang memleak], they are not needed testing current HEAD 5bfe2b8c1439354d25dc5b1779cd0bb75bb90a7f testing commit 5bfe2b8c1439354d25dc5b1779cd0bb75bb90a7f gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 185d7c0a3e947ffcc14b32274a3b33694803d0a700b56a1bf745055b22bf3b69 run #0: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #1: crashed: KASAN: use-after-free Write in firmware_param_path_get run #2: crashed: KASAN: use-after-free Write in firmware_param_path_get run #3: crashed: KASAN: use-after-free Write in firmware_param_path_get run #4: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #5: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #6: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #7: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #8: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get run #9: crashed: KASAN: slab-out-of-bounds Write in firmware_param_path_get representative crash: KASAN: slab-out-of-bounds Write in firmware_param_path_get, types: [KASAN-WRITE KASAN-USE-AFTER-FREE-WRITE] crash still not fixed/happens on the oldest tested release revisions tested: 7, total time: 1h42m32.025218277s (build: 26m37.37981721s, test: 37m55.324493441s) crash still not fixed or there were kernel test errors commit msg: Revert "mmc: sdhci: make tuning_err a signed int" crash: KASAN: slab-out-of-bounds Write in firmware_param_path_get ================================================================== BUG: KASAN: slab-out-of-bounds in firmware_param_path_get+0xe2/0xf0 drivers/base/firmware_loader/main.c:531 Write of size 1 at addr ffff88811367dfff by task syz.2.17/452 CPU: 1 PID: 452 Comm: syz.2.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x38/0x49 lib/dump_stack.c:106 print_address_description.constprop.0+0x24/0x160 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report.cold+0x82/0xdb mm/kasan/report.c:444 __asan_report_store1_noabort+0x17/0x20 mm/kasan/report_generic.c:311 firmware_param_path_get+0xe2/0xf0 drivers/base/firmware_loader/main.c:531 param_attr_show+0x130/0x1f0 kernel/params.c:567 module_attr_show+0x3f/0x70 kernel/params.c:886 sysfs_kf_seq_show+0x218/0x430 fs/sysfs/file.c:61 kernfs_seq_show+0x146/0x1b0 fs/kernfs/file.c:168 seq_read_iter+0x3fd/0x1020 fs/seq_file.c:230 kernfs_fop_read_iter+0x3e0/0x550 fs/kernfs/file.c:241 call_read_iter include/linux/fs.h:2206 [inline] new_sync_read+0x353/0x6d0 fs/read_write.c:404 vfs_read+0x34a/0x4b0 fs/read_write.c:485 ksys_read+0x111/0x210 fs/read_write.c:623 __do_sys_read fs/read_write.c:633 [inline] __se_sys_read fs/read_write.c:631 [inline] __x64_sys_read+0x6e/0xb0 fs/read_write.c:631 x64_sys_call+0x982/0x990 arch/x86/include/generated/asm/syscalls_64.h:1 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x33/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fa5ad35ef99 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa5ad1c0028 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007fa5ad5e6fa0 RCX: 00007fa5ad35ef99 RDX: 000000000000204e RSI: 0000200000002440 RDI: 0000000000000003 RBP: 00007fa5ad3f5ec4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fa5ad5e7038 R14: 00007fa5ad5e6fa0 R15: 00007fff9c181ec8 Allocated by task 402: kasan_save_stack+0x26/0x50 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:433 [inline] ____kasan_kmalloc mm/kasan/common.c:512 [inline] ____kasan_kmalloc mm/kasan/common.c:471 [inline] __kasan_kmalloc+0xae/0xe0 mm/kasan/common.c:521 kasan_kmalloc include/linux/kasan.h:227 [inline] kmem_cache_alloc_trace+0x30c/0x4e0 mm/slub.c:3274 kmalloc include/linux/slab.h:619 [inline] kzalloc include/linux/slab.h:750 [inline] kernfs_iop_get_link fs/kernfs/symlink.c:136 [inline] kernfs_iop_get_link+0x5d/0x620 fs/kernfs/symlink.c:127 pick_link fs/namei.c:1783 [inline] step_into+0x146c/0x1e50 fs/namei.c:1840 open_last_lookups fs/namei.c:3563 [inline] path_openat+0x40f/0x4180 fs/namei.c:3747 do_filp_open+0x1ab/0x3f0 fs/namei.c:3777 do_sys_openat2+0x135/0x8f0 fs/open.c:1236 do_sys_open fs/open.c:1252 [inline] __do_sys_openat fs/open.c:1268 [inline] __se_sys_openat fs/open.c:1263 [inline] __x64_sys_openat+0x124/0x200 fs/open.c:1263 x64_sys_call+0x2eb/0x990 arch/x86/include/generated/asm/syscalls_64.h:258 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x33/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Freed by task 402: kasan_save_stack+0x26/0x50 mm/kasan/common.c:38 kasan_set_track+0x25/0x30 mm/kasan/common.c:45 kasan_set_free_info+0x24/0x40 mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:365 [inline] ____kasan_slab_free mm/kasan/common.c:327 [inline] __kasan_slab_free+0x111/0x150 mm/kasan/common.c:373 kasan_slab_free include/linux/kasan.h:193 [inline] slab_free_hook mm/slub.c:1728 [inline] slab_free_freelist_hook+0x94/0x1a0 mm/slub.c:1754 slab_free mm/slub.c:3526 [inline] kfree+0xc2/0x2a0 mm/slub.c:4588 kfree_link+0x9/0x10 fs/libfs.c:1216 do_delayed_call include/linux/delayed_call.h:28 [inline] put_link fs/namei.c:1020 [inline] open_last_lookups fs/namei.c:3562 [inline] path_openat+0xb93/0x4180 fs/namei.c:3747 do_filp_open+0x1ab/0x3f0 fs/namei.c:3777 do_sys_openat2+0x135/0x8f0 fs/open.c:1236 do_sys_open fs/open.c:1252 [inline] __do_sys_openat fs/open.c:1268 [inline] __se_sys_openat fs/open.c:1263 [inline] __x64_sys_openat+0x124/0x200 fs/open.c:1263 x64_sys_call+0x2eb/0x990 arch/x86/include/generated/asm/syscalls_64.h:258 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x33/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 The buggy address belongs to the object at ffff88811367c000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 4095 bytes to the right of 4096-byte region [ffff88811367c000, ffff88811367d000) The buggy address belongs to the page: page:ffffea00044d9e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x113678 head:ffffea00044d9e00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043380 raw: 0000000000000000 0000000080040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 107, ts 4610107504, free_ts 0 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook mm/page_alloc.c:2607 [inline] prep_new_page+0x1a2/0x310 mm/page_alloc.c:2613 get_page_from_freelist+0x1ce2/0x30a0 mm/page_alloc.c:4487 __alloc_pages+0x300/0x2d60 mm/page_alloc.c:5824 __alloc_pages_node include/linux/gfp.h:595 [inline] alloc_pages_node include/linux/gfp.h:609 [inline] alloc_pages include/linux/gfp.h:622 [inline] alloc_slab_page mm/slub.c:1798 [inline] allocate_slab+0x39d/0x530 mm/slub.c:1937 new_slab mm/slub.c:2000 [inline] ___slab_alloc.constprop.0+0x3ca/0x890 mm/slub.c:3033 __slab_alloc.constprop.0+0x42/0x80 mm/slub.c:3120 slab_alloc_node mm/slub.c:3211 [inline] slab_alloc mm/slub.c:3255 [inline] __kmalloc+0x505/0x550 mm/slub.c:4432 __kmalloc_node include/linux/slab.h:487 [inline] kmalloc_node include/linux/slab.h:642 [inline] kvmalloc_node+0x1f3/0x230 mm/util.c:621 kvmalloc include/linux/mm.h:862 [inline] seq_buf_alloc fs/seq_file.c:38 [inline] seq_read_iter+0x684/0x1020 fs/seq_file.c:210 kernfs_fop_read_iter+0x3e0/0x550 fs/kernfs/file.c:241 call_read_iter include/linux/fs.h:2206 [inline] new_sync_read+0x353/0x6d0 fs/read_write.c:404 vfs_read+0x34a/0x4b0 fs/read_write.c:485 ksys_read+0x111/0x210 fs/read_write.c:623 __do_sys_read fs/read_write.c:633 [inline] __se_sys_read fs/read_write.c:631 [inline] __x64_sys_read+0x6e/0xb0 fs/read_write.c:631 x64_sys_call+0x982/0x990 arch/x86/include/generated/asm/syscalls_64.h:1 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x33/0x80 arch/x86/entry/common.c:80 page_owner free stack trace missing Memory state around the buggy address: ffff88811367de80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88811367df00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88811367df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88811367e000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88811367e080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================